add custom import file

mmv1/templates/terraform/custom_import/bigquery_reservation_capacity_commitment_set_id.go.erb

@@ -0,0 +1,22 @@
+config := meta.(*transport_tpg.Config)
+if err := tpgresource.ParseImportId([]string{
+  "^projects/(?P<project>[^/]+)/locations/(?P<location>[^/]+)/capacityCommitments/(?P<capacity_commitment_id>[^/]+)$",
+  "^(?P<project>[^/]+)/(?P<location>[^/]+)/(?P<capacity_commitment_id>[^/]+)$",
+  "^(?P<location>[^/]+)/(?P<capacity_commitment_id>[^/]+)$",
+}, d, config); err != nil {
+  return nil, err
+}
+
+// Set name based on the components
+if err := d.Set("name", "projects/{{project}}/locations/{{location}}/capacityCommitments/{{capacity_commitment_id}}"); err != nil {
+  return nil, fmt.Errorf("Error setting name: %s", err)
+}
+
+// Replace import id for the resource id
+id, err := tpgresource.ReplaceVars(d, config, d.Get("name").(string))
+if err != nil {
+  return nil, fmt.Errorf("Error constructing id: %s", err)
+}
+d.SetId(id)
+
+return []*schema.ResourceData{d}, nil